Work Item
ASTM WK84664

Revision of C670-15 Standard Practice for Preparing Precision and Bias Statements for Test Methods for Construction Materials


Changes to 5. Basis for Precision Statement are meant to improve clarity. 5.1 was reworded to clarify the role of laboratories in generating data and other changes are meant to improve readability. Changes in 5.4 removes a confusing phrase “as a minimum” and breaks up a long sentence into separate sentences. Also the addition of the statement about difference limits not being included makes it agree with language used in X1.7. The change in 5.6 is meant to emphasize inclusion of known potential sources variation.


Developed by Subcommittee: C09.94

Committee: C09

Staff Manager: W Scott Orthey

Work Item Status

Date Initiated: 01-03-2023

Technical Contact: Heath Hall

Item: 000